Driving mechanism for ore-concentrators



W. G. BURNS.

DRIVING MECHANISM FOR ORE CONCENTRATORS. APPLICATION FILED SEPT. 26, 1919.

Patented Sept. 21,1920.

5 SHEETS-SHEET l.-

I INVENTOR W. G. BURNS.

DRIVING MECHANISM FOR ORE CONCENTRATORS.

APPLICATION FILED sEPT.26. 1919.

1,353,451 Patented Sept. 21, 1920.

5 SHEETS-$HEET 2'.

INVENTOR A W. G. BURNS.

DRIVING MECHANISM FOR ORE CONCENTRATORS. APPLICATION FILED SEPT.26, 1919.

I 1,353A51. PatentedSept 21,1920.

5 SHEETS-SHEET 3- Q71 INVENTbR W. G. BURNS. D RIVING MECHANISM FOR ORE CONCENTQATORS.

APPLICATION FILED SEPI'.26. I919- Pateniie'dSep't. 211,- 1920.

5 SHE ifs-SHE ET 4.

:IiwMWiii 2. RN

i INQENTOR W. G. BURNS. DRIVING MECHANISM FOR ORE CONCENTRATORS. APPLICATION FILED sEPT.26. i919.

1,353,45L I Paten edse tf21,i920,

5 SHEETS-SHEET 5.

rarest WALTER G. BURNS, OF FORT "WAYNE, INDIANA,

DRIVING MECHANISM FOR ORECONCEJSTTBATQR$.

, Specification of Letters Patent.

Patented Sept. 221., 19213.

Application filed September 26, 1919. Serial No. 326,593.

This invention relates to improvements in driving mechanism for ore concentrators of that class used tor imparting differential reclprocations to a table upon which mineral is separated from its ore, and the ob- 'jects thereof are: First, to so construct the apparatus as to admit of adjustments that eii'ect various degrees of differential action in the reciprocal movements imparted to the table, and so that the adjustments may be readily made while the apparatus is in operation; second, tciconstruct the apparatus so that its period o'txnaximum differential action may be'adjustably shifted while in operation from one point to another in its cycle of movement; third, to construct the apparatus so that the adjusting members for its differential action and the drive- .wheel may be transposed from one side of the machine to the other; and fourth, to provide a housing for supporting and co ntaining the principal working parts of the apparatus, so constructed as to hold a quantity of lubricating oil for a. tomatically bathing, the working parts and e circumvent seepage of the oil froirlehet son the arts of the housing.

The objects of the invention are accomplished by the construction illustrated in the accompanying drawings in. which Figure 1 is an end elevation of the driving mechanism;

Fig. 2 is a detail view showing the end of the eccentric shaft opposite that shown in Fig. 1 including a portion of the main stand partly broken away and in section, and the securing means for the shaft;

Fig. 3 is a detail view of the adjustable eccentric and the drag thereon and including the drive-shaft, parts thereof being broken away and in section;

Fig. 4: is an elevation of the device in a position opposite that of Fig. 1. and including part of a table with connecting parts, the. main stand beingin central section and other parts being broken away and in section - trough is chambered saddle 6 with.

' cap 13 that ringmounted Fig. 5 is a rear elevation of Fig. 4:, the main stand being partly in longitudinal. central section;

Fig. 6 is a plan view of the device, a portion thereof being broken away; I

Fig. 7 bottom plan of the cover 101' the main stand; and I Eig. 8 is a detail end View assemblage of the follower, drive-crank, drag-ring mounted upon its eccentric bearshowing an is a detail view showing a partial ing', the toggles, and the drive-shaft, the

latter being shown in cross-section and other movable parts being shown in dotted out llnein opposite positlons.

Similar characters oi? reference indicate corresponding parts throughout the several views, and havingreference now same;

are counterparts oppositely arranged in parallel relationship, and each has a supporting; boss 3 for the eccentric sha'tt & and is cast integral with a trough 5 which is transversely disposed. At each end of the a duct 7 made therein extendingiroin the bottom "of its chamber 8 into the trough. in the upper edges of the trough, extending the front, back and ends thereof, and across the adjacent parts of the saddles into the chambers 8 thereof, are corresponding continuous grooves 9, the external. lips 10 along the grooves projecting higher than the internal lips 11 so that any excess, of oil that may be splashed from the trough into the grooves will overflow directly back into the trough or pass indirectly back thereinto through the chambers 8 and ducts '4'.

A cover 12 is positioned over and has at each end thereof a chambered rests upon the corresponding saddle G on the main stand, and. has also at its front, back and ends, continuous beads 14; that depend respectively into the adjacent grooves 9 in the trough, the arrangementof /which serves as an oil trap that tends to pro vent escape of the contained oil out from he- 1 is the main stand, the ends 2 of which;

to they 953 the trougl tween the cover and trough. Overhangir ledges 15 along the lower edges oi the C(lvfi'li extend over the corresponding external. lips.

10 on the stand, there being grooves in up into which the respective lips project. The

grooves 16 also e rtend'aoross faces of the caps into the chambers 3. therein respectively,

the adjacent Zllhe ledges prevent en trance of foreign matter into the grooves in the trouglu and the grooves extending across the faces of the saddles and caps d1- vert oil from between the faces into the chambers 8 and 17. The lips 10 and 11 on the trough and the grooves 9, and the ledges 15, bead l4 and grooves 16 of the cover 12 are so proportioned and positioned that an open space 18 is left between each edge of the cover and corresponding edge of the trough when the caps rest in place respec tively upon the saddles. Thus, creeping of oil by capillary attraction out from between the cover and trough is obviated. In the top of the cover is a hand-hole 19 which is closed by a lid 20, and in the front of the cover is made a hood 21 through the opening 22 of which extends an arm 23 of a bell crank 24, the latter being-mounted loosely upon the eccentric 25 of the shaft 4. The hood 21 has an internal head '26 at its front and the arm 23 of the bell-crank has a projecting guard 27 which prevents oil from splashing out through the hood opening.

7 The ends of the eccentric shaft 4 extend into corresponding split bushings 28 that are positioned respectively in the supporting bosses 3, each bushing being held therein by a cap-screw 29 in position to be clamped upon the shaft 4 by st eet-screw 30, and hold the shaft in adjusted positions. One end of the shaft projects outwardly and has fixed thereon an adjusting nut'3l haying an integral lug 32 that limits the turning move nient of the eccentric shaft by coming into contact with either end ofa segmental flange 33 on the'boss. The nut hasalso an index 34. positioned oppositely from the'eccentric so that the adjusted positions thereof may be determined.

'The bell-cranlr 24-l1as a slotted pendent arm 85 in whichis arranged a cross-head 36, and a screw 37 extending therethrough. for the vertical adjustment of the crosshead. A handpiece 88 is fixed upon the upper end of the screw by which it is turned. A yoke-pin 39 in the CI'OSSThBHd has connection with a yoke 40 and the latter is coupled with a swinging lever 41 by an eye-bolt 42 and pin 43. The base 44, reciprocating table 45 and the swinging lever 41 are of a character well known the table rocks upon the eccentric 25 the table is reciprocated. j Between each saddle 6 and corresponding cap 13 is positioned a ournal box 46 and 47 respectively which support the drive-shaft 48 in central alinement in the housing formed by the trough and cover. (hie end of the drive-shaftprojects outwardly and has mounted thereon a drive-wheel 49 and loose pulley 50. The journal box 46 has near its outer end an internal annular recess 51 and a duct .52 leading therefrom into the chamber 8 of the saddle 6 for the passage of surplus oil from the journal box thereinto, and a ring 53 fitting tightly upon the shaft 48 and extending into the recess 51 prevents oil from escaping from the end of the journal box. The inner end of the journal box 46 has a chatfing flange 54, and also a slot 55 in which extends a ring oiler 56 for the shaft 48. The outer end 57 of the journal box 47 is hexagonal and adapted for the application of a wrench for adjustably turning it in the saddle in which the box is held. The inner end of the journal box 47 has an integral eccentric 58 upon which is loosely mounted a drag-ring 59 having two pins 60 each of which projects in a line parallel with the drive-shaft 48.

'1hedrag-ringhas oil-holes 61 through which i the eccentric is lubricated, andthe eccentric also has an oil-hole 62 through which the driveshaft receives lubricant from between the drag-ring and eccentric.

, Upon the drive-shaft is fixed a drive crank 63 having a wrist-pin 64 which is linked with one vof'the pins 60 on the dragringby a toggle 65, so that as th e crank revolves with the shaft the drag-ring is rotated upon the eccentric 58. Upon the drive-shaft is loosely mounted a followerv consisting of an oscillating eccentric 66 hav ing a radially disposed integral arm 67 at one end thereof provided with a wrlst-pin 68 positioned to move in the same path as the wrist-pin 64 on the drive-crank The other pin 60 on the drag-ring is coupled with the wrist-pin 68 on the arm 67 by a toggle 69 so that as the drag-ring rotates upon the eccentric 58 the follower is caused torevolve with the drive-shaft as its axis. The pins 60 on the drag-ring are directed thereby in a circular path that is eccentric to the drive-shaft, and the wrist-pin 64 and 68 on the drive-crank 63 and rad1al arm 67 respectively travel in a circular path that is concentric with the drive-shaft, and consequently during each cycle. of movement the toggles function as such, causing the radial arm and the eccentric 66 integral therewith to oscillate upon the drive-shaft. Thus, when the drive-shaft is rotated un1- formly the eccentric 66 is rotated dill'erentially. By turning the journal box 47 the eccentric bearing 58 integral therewith may be adjustably positioned so that the'period of maximum difierential action in the cycle of movement of the oscillating eccentric'will accordingly be changed. The journal box 47 is held in adjusted positions by tighten" ing the bolts 13. The drive-crank 63 and the radial arm 67 each have a beater'70 projecting from its outer end adapted to splash oil from the body 71 contained in the trough onto the adjacent working parts of the mechanism as they revolve.

A roller 72 is loosely'mounted upon the oscillating eccentric 66 and is held thereon between the radial arm 67 and the chaffing flange 54 at the inner end of the journal box 46, and upon the roller rests the curved bearing 73 of the arm 23. As the oscillating eccentric revolves with the drive-shaft and oscillates thereon, the roller therebyis gyrated differentially and rollsback and forth in constant contact with the curved bearing 73, which action augments the differential rocking movement imparted to the" bellcrank. By adjustably turning the eccentric shaft 4 the bell-crank may be shifted so that the augmented differential action thereof will be more or less pronounced accordingly.

The oscillating eccentric 66 has an internal oil groove 74 extending longitudinally thereinthrough which it receives surplus lubricant from the journal box 46 adjacent thereto, and has also an oil passageway 7 5 through which the roller receives oil from the groove 74, there being a longitudinal groove 76 for distributing the lubricant be tween theoscillating eccentric and the roller mounted thereon. Thus, as the drive-shaft rotates, the ring oiler 56 deposits oil from the body contained in the trough and "into which the ring oiler depends onto the driveshaft, effecting lubrication of the journal box 46 and the operating parts of the mechanism adjacent thereto.

In operating the invention, the drive-shaft together with all of the parts mounted thereon including the journal boxes maybe placed in the housing in the reverse position if so desired, in which event the respective connections between the drive-crank and radial arm and their toggles should be transposed, and the eccentric shaft l should also be reversed endwise so that the adjusting nut 31 will be conveniently accessible from the side of the machine opposite the drive-= wheel. The body of lubricating oil ismaintained in the trough by occasional replenishment through the hand-hole in the cover, and the drive-wheel is rotated uniformly over toward the, table by applying a belt in the customary manner. he oil in the trough is splashed about therein over the contained working parts by the action of the beaters, and the grooves 9 in the edges of the trough become filled to the extent that the lower edges of the beads 14 are submerged, thus the oil-charged atmosphere that is circulated by the rotating mechanism. is retained within the housing. Any over-' I plus of oil that may enter the grooves either overflows the internal lips 11 or flows [into the chambers 8 and returns into the trough through the ducts '3'.

' tially revolve the follower.

The length of stroke imparted to the table maybe varied by manipulating the adjusting screw 37; the ,velocity ratio between the forward and return strokes may be'altered, by adjustably positioning the eccentric 58; and the dilferential character of the cycle of movements may be accentuated more or less by" adjustably turning the eccentric shaft 4. f

What I claim is t 1. In mechanism of the class described having a main stand and rockin member, a drive-shaft; a drive-crank fixe thereon a bearing eccentric'ally positioned relative to the drive-shaft; a drag-ring on the bearing; an eccentric having a radial arm loosely mounted on the drive-shaft; a pair of toggles carried by the drag-ring, having con nections respectively with the drive-crank and radial arm and being adapted to impart oscillating movement to the eccentric as it is revolved; and a roller on the eccentric for 4. ln mechanism including a stand and rocking member, a rotary driving member; a follower loosely mounted thereon; a bearing eccentrically positioned relative to the axis of the driving member; a toggle mechanism rotatable on the bearing, having coni nect1ons respectively w1th the driving member and follower and being adapted to be driven by the former and differentially actuate the latter; .,and a nedium on the follower for actuating the rocking member.

5. As a new mechanical movement, a rotary driving member; a revolving drag--v member; a follower loosely mounted on the driving member; a pair of toggles carried by the drag-member and having connections respectively with the drive member and follower and being adapted to actuate the latter differentially as the former moves uniformly; anda. bearing for the dragmember positioned eccentrically relative 'to the driving member and being adapted to be adjustably turned so as to shift the period of maximum differential action thereof from one part of its cycle to another.

6. In mechanism for actuating a rocking an efcentric ft and carried by the drag-member and having connections respectively With the crank and arm, and being adapted to impart dif ferential rotary motion to the eccentric when the drive-'shaft'is revolved uniformly; a bearing for the drag member'positioned ecoentrically relative to the drive-shaft and being-adapted to be adjustably turned as toshift the period of maximum differential action in the cycle of the eccentric; and an actuatlng medium between the'eccentric and rocking member.

7. In apparatus of the class described, a stand; a mechanism having a difl'erentially gyrated follower; a rocking member having afc urvedbearing actuated by the follower; and an adjustable shaft having an eccentric supporting the rocking member; and means in connection with the shaft anri stand for aldjustably positioning andLse uring the S 13 L In testi zany fHe'i'e'ofI afli-Xmy signature, in presence of two Witnesses.

WALTER o. BURNS. 

